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i sneencatiombf-meu-.m ratentfanni...gzzkiuatednagusai7,. 184er hadntoithe r accompanying.drawings,makingt l l a part-lof this:speciiicationpiniwhich# t t Figure 1, is fanperspectifve representations of afshingle machine; `,Figgyy a:.view-f;'of the'. upper surfaces of` lthe ,revolvingntable of'fthe -1 samefwith: thesimprovementsajF 3, awiewfiof the lower surfacecoffi:thentablepnandclthe other gureszwviews ofiV tlfie'fpants'; constituting the improvements, which consistsinif the use of an apparatus fin@4 the tablebefore each knife for regulating the throat @ofthe knife and the thickness of the article to be cut.

In the drawings like parts are represented by the same letters.

In Fig. l A, A, are the posts of the frame; B, B, cross ties, connecting the foot of the posts; C, C, frame-work, connecting the tops of the posts and forming the hoppers for the reception of the blocks to be cut; D, D, weighted levers, to sustain an equable pressure of the blocks, and, E -E a horizontally revolving table, in the surface of which are two knives or cutters a a. These are let into the table until their edge is even with its surface and are so placed in relation to each other, that only one of them is in the act of cutting at the same time. They enter the blocks at the end nearest the axis of the table and out them obliquely to the course of the grain. On the under side they are beveled 3/16 of an inch to the inch, the surface being slightly concave; and, on the .upper side, 1/16 of an inch for one inch, the remaining part being even with the surface of the table. The surface of the table is lowered from near the back of one knife around to the surface of the other, forming an inclined surface, sufficient in width for the length of the article to be cut, and,`in depth, for the thickness of it, together with the apparatus for regulating the throat of the knife.

The apparatus is to be made of iron,

wrought or cast and be held in place and ,zontalwviews of ait', ,asfit appears rout'ofl ithe t `table, showing` itl to consist :of aaplate f b f' and tionaofntashowing; that platee?) iis.K bentiat fright aanglestunden the-edge offltheaknidiey. theventical .pa-rt sbeingrthe-samedn width.' as

are fastened .toathe plateafbwmeansfiof-vvftwo.

lated... Zu 02.-. are` boltsiextendingg; downr' i Vthrougllfl the `table e and i p latef-` e, z ,havingg; ad y crewacut vSona-the lower..z endsiby-j whichctheyy` nuts, i one above c andsA the f otherr belowal ita.Y

Vhatappearlto beethe headsroff `the #bolts are vertical. fsectionssof .fthe llimbs.L c c. Afilittle belowh ther limb, .t eachbolt hasi` a folding,-V

limb in raising or lowering it or moving it` forward. The end of the limbs 4is raised and lowered and held in place by the action of the nuts upon the bolts on plate e which is bolted firmly to the table. Driving the nuts down, raises the limbs; driving them i up, lowers them.

Figs. 8 and 9 show the manner in which the end of the apparatus next to the knives as held and regulated. Fig. 9 is an end and back view of a plate It which lies beneath plate b. It bends twice at right anglesthe upper and lower parts facing the upper and lower surfaces of the table and the vertical parts, facing the opening through it under the edge of the knife. A view of the upper and lower part is given in Fig. 10, the bolt f, attached to the center of plate b Fig. 8 passing down through the center opening and bolts 9|, g, Fig. 9 passing up through the outer ones. A screw is cut on the lower end of the former bolt; and on the upper end of the latter. Turning down the nut on bolt f and up bolts g g, raises this end of the apparatus; turning the nut up and the bolts down, lowers it. The action of the screws on bolts g g being opposed to that on bolt f, the one sets the other; and in like manner the action of the nuts on each other on bolts d ci.

The apparatus may be set with the surface of plate parallel to the edge of the knife, so as to cut an article of uniform thickness as veneers, or with one side higher than the other, as shown in Fig. 2, soas to cut an article thicker at one end than the other as shingles.

Z is a screw situated centrally of the vertical part of plate b and when driven in presses against the vertical part of plate h, the effect of which is to draw the apparatus forward under the edge of the knife. The knife is constantly wearing and the edge of it retiring from the edge of the apparatus. By the use of this screw in this manner and the adjustment of the apparatus so asV to be moved forward by it, the edge of the knife and corner of plate b may be kept in the same relative position so long as the knives are lit for use. The center opening in Fig. 10, through which bolt f passes, is made oblong to allow the apparatus to move forward; and in like manner are made the openings in the table through which pass bolts d d.

The apparatus may be constructed with the circular limbs as in Fig. t or with two as in Fig. 6. In a table of large diameter three limbs are preferable; in one of small, two will answer; in the latter the limbs should spring from the plate a little toward the center from the end as shown in Fig. 11,

so as to present proper sections of support A to the blocks.

The advantages of the apparatus are, it affords ready means to regulate the throat of the knives so as to cut an article uniform in thickness or an article varying in thickness; it is moved forward as the knife wears and preserves the form of the throat in that respect; and the limbs form ways upon which the timber-moves with less friction than on the surface of the table.

Having thus fully described the nature of my improvements in the manner of combining, regulating and adjusting the knives and revolving table in machines for cutting shingles; what I claim therein as new and desire to secure by Letters Patent is- The manner in which I regulate the throat of the knives or cutters and the thickness of the article to be cut, by means of an apparatus, consisting of an angular plate b and circular limbs c c which are let into grooves in the table; the apparatus being held in place and adjusted by set screws connected with the plate and limbs, the latter serving as ways for sustaining the blocks; the whole being formed and operating substantially as herein set forth.

ROBERT A. QUATERMASS.

Witnesses:

JOHN R. GRoUT, JAS. Gow. 

